Merge tag 'kvm-x86-selftests-6.3' of https://github.com/kvm-x86/linux into HEAD

KVM selftests changes for 6.3:

 - Cache the CPU vendor (AMD vs. Intel) and use the info to emit the correct
   hypercall instruction instead of relying on KVM to patch in VMMCALL

 - A variety of one-off cleanups and fixes

diff --cc tools/testing/selftests/kvm/lib/kvm_util.c
Simple merge

diff --cc tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
Simple merge